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Chemistry MCQs

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Practice free Chemistry multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 1238 questions — no login required.

Question 1hard

Which of the following phenomenon is considered responsible for Global Warming?

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Question 2easy

The nucleus of an atom consists of

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Question 3medium

The number of moles of solute present in 1 kg of a solvent is called its

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Question 4easy

The most electronegative element among the following is

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Question 5medium

The metal used to recover copper from a solution of copper sulphate is

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Question 6hard

The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

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Question 7medium

The metallurgical process in which a metal is obtained in a fused state is called

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Question 8medium

The molecules of which gas have highest speed?

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Question 9hard

The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth's early life and solidified into hard rock's called

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